The highlight of this update is new, more granular audio controls, which allow users to determine individual volume levels for apps they've snapped onto the Xbox One's main display. To put it more simply, if you're playing a game while also chatting with people on Skype, you can turn the game down, and turn the chat up, preventing your crucial conversation from being drowned out by explosions.
Additionally, the update adds a new feedback tool designed to send information directly to Microsoft from the Xbox One automatically. This program is entirely voluntary, but according to Microsoft the goal is not to snoop on players, but instead to collect audio samples which may be used to improve the console's voice recognition capabilities.
Like all Xbox One updates, Microsoft plans to gradually issue this new software version to users. While some will find the update available at this very moment, others may have to wait a few hours or even a day. According to Hryb, the update should be available to everyone by early next week. Full details on the update can be found on Hryb's official blog.
Microsoft Xbox One